/Engine/Source/Runtime/GeometryCore/Public/Polygon2.h
Find all the points where an edge of the Polygon intersects an edge of the OtherPolygon
true if any intersections were found
bool FindIntersections ( const [TPolygon2](API\Runtime\GeometryCore\TPolygon2)< T > & OtherPoly, [TArray](API\Runtime\Core\Containers\TArray)< [TVector2](API\Runtime\Core\Math\TVector2)< T >> & OutArray ) const